He sounded like he believed that, and she doubted that he would lie about that bit. Whether or not Loki could actually do it remained to be seen, though. Maybe Loki just hadn't done it to Barton yet.
"If I could get my hands on them I just might." She wondered if anyone else felt the same way about those collars as she did. Bruce putting one on himself was one thing (even though she didn't like that, either). Forcing them on others, whether they 'deserved' it or not, was something else entirely.
She hated to admit it, but he had a point about the grenade. He could have held it for an extra second or two, not giving her enough time to see it and dodge, screaming for others to move as well. "What were you trying to accomplish with her?" she asked as she started to walk as well, moving back in the direction she had been heading.